diff --git a/interface/progmem-generator.js b/interface/progmem-generator.js
index 79f4f4f18..211721a2c 100644
--- a/interface/progmem-generator.js
+++ b/interface/progmem-generator.js
@@ -50,7 +50,7 @@ static constexpr size_t WWW_ASSETS_COUNT = sizeof(WWW_ASSETS) / sizeof(WWW_ASSET
 // (e.g. "en,de,nl"). When set, locale chunks outside the list are NOT embedded
 // into firmware flash. `en` is always kept as the fallback. Unset => embed all.
 const ALL_LOCALES = [
-  'cz',
+  'cs',
   'de',
   'en',
   'fr',
diff --git a/interface/src/app/settings/ApplicationSettings.tsx b/interface/src/app/settings/ApplicationSettings.tsx
index 44e3a0fb0..1ccd06fb8 100644
--- a/interface/src/app/settings/ApplicationSettings.tsx
+++ b/interface/src/app/settings/ApplicationSettings.tsx
@@ -548,7 +548,7 @@ const ApplicationSettings = () => {
               margin="normal"
               select
             >
-              <MenuItem value="cs">Česky (CZ)</MenuItem>
+              <MenuItem value="cs">Česky (CS)</MenuItem>
               <MenuItem value="de">Deutsch (DE)</MenuItem>
               <MenuItem value="en">English (EN)</MenuItem>
               <MenuItem value="fr">Français (FR)</MenuItem>
diff --git a/src/core/locale_translations.h b/src/core/locale_translations.h
index b96084df9..89ed552b8 100644
--- a/src/core/locale_translations.h
+++ b/src/core/locale_translations.h
@@ -369,7 +369,7 @@ MAKE_WORD_TRANSLATION(bookshelf, "mdi:bookshelf", "mdi:bookshelf")
 // MQTT Discovery - this is special device entity for 'climate'
 MAKE_TRANSLATION(haclimate, "haclimate", "mqtt discovery current room temperature", "Discovery aktuelle Raumtemperatur", "Discovery huidige kamertemperatuur", "MQTT Discovery för aktuell rumstemperatur", "termostat w HA", "HA Avlest temp", "découverte mqtt température actuelle", "Güncel osa sıcaklığı", "verifica temperatura ambiente attuale", "mqtt discovery aktuálna teplota v miestnosti", "mqtt discovery aktuální pokojová teplota")
 
-// Entity translations: tag, mqtt, en, de, nl, sv, pl, no, fr, tr, it, sk, cz
+// Entity translations: tag, mqtt, en, de, nl, sv, pl, no, fr, tr, it, sk, cs
 // Boiler
 MAKE_TRANSLATION(chimneysweeper, "chimneysweeper", "chimney sweeper", "Schornsteinfeger", "schoorsteenveger", "Sotare", "tryb kominiarza", "feier", "ramoneur", "baca temizleyici", "spazzacamino", "kominár", "kominík")
 MAKE_TRANSLATION(reset, "reset", "reset", "Reset", "Reset", "Återställ", "kasowanie komunikatu", "nullstill", "reset", "Sıfırla", "Reset", "reset", "reset")